Description And Operation: Engine: Notes

The 2.0L Zetec engine is a four cylinder in-line engine with double overhead camshafts and 16 valves. The 16 valve cylinder head improves volumetric efficiency, particularly at high engine speeds.

The cylinder head is made of aluminum alloy and the cylinder block is made of cast iron.

Fig 1: Locating Serial Number On Cylinder Block

Courtesy of FORD MOTOR CO.

The spark plug is installed in the center of the roof-shaped combustion chamber to ignite the air/fuel mixture in the combustion chamber. The central location of the spark plug causes the flame front to be evenly spread across the combustion chamber, which also reduces spark knock.

Both camshafts are driven by a shared timing belt, and operate four valves per cylinder by means of mechanical valve tappets. One valve spring on each valve is used to close the valve.